Back to The Roots Organic Seed Starting, Compressed Block expands to 12 Quarts, Made for Herbs, Veggies, Flowers

I was skeptical when I first got this but wow am I impressed! This stuff is great. Better than description and it expanse a lot....a whole lot. Very easy to work with too. I am placing more orders. Very quick delivery too. Buy it. You wont regret it. Perfect for starting seeds, soil amendment and more.

High moisture retention, great rate of germination, love the quality of the product

This is great for starting seeds! I had five seed trays and only used half of this to fill them. After following instructions, adding water, it doubled in size.

Great soil, just add water and watch it expand.

UPDATE: while seeds germinated faster with this mix, the seeds planted in MiracleGro seed starting mix did all eventually germinate and in fact are now looking much more healthy than the Back to Roots mix. Top 2 rows in second photo are in miracle gro mix, bottom 2 rows in back to roots mixture. I’m changing from 5-stars to 4 only because I think the miraclegro seed starting mix is out performing Original review: 100% germination of tomato seeds with this mix vs about 65% germination with Miracle Gro brand seed starting mix in same environment. Used covered tray with grow lights, warming pad and “Cow Pots” 3” pots.

This Back to The Roots Organic Seed Starter is really easy to use and a good value. It retains moisture well and expands to fill several pots (12 quarts). It has good consistency and some of the seedlings appear to be starting to sprout. A good value for a nice-sized block of compressed starter, I would purchase this product again; five stars from me.

I typically like Back to the Roots' products, but this one is a huge pass from me. I started my first tray of seedlings in this mix and a second tray with another mix - both were otherwise kept in the same growing conditions in a controlled environment. I'm giving 3 stars only because, technically, most everything germinated. However, this mix had so many huge chunks in it and most of the seedlings suffered from damping off (I actually grew a mushroom in one cell) or just plain struggled beyond the initial germination. They were not overwatered, and were actually bottom watered. This may be fine as a potting mix, but for seedlings vulnerable to mold/fungus (they're not so vulnerable once a bit bigger) I'm sticking to something that is more sterile.

Whoa it’s insane how much the stuff expands there was quite a bit more than it even said was in the package but good product excellent